Hemoglobinometer



G. BENNETT, SR.

Patented Sept. 13,1921" 3 SHEETSSHEET'I.

6:. BENNETT, Sn. HEMOGLOBINOMETER.

APPLICATION FILED JUNE 18, I920.

1,390,422, PatentedSept. 13, 1921.

3 SHEETS-SHEET 2.

III

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4 G. BENNETT, Sn.

HEMOGLOBINOMETER.

APPLICATION man mu: 1a, 1920.

PatentedSept.

ST TES GEORGE BENNETT, .sR, o rHIEAnELrHIA, r'E NsYLvANIA, -ASSIG1\TOR 'ro. AME L CA INSTRUMENT COMPANY, A PARTNERSHIP COMPOSED or GEORGE BENNETT, sR., HARRY w. POI-ILKE, AND WILLIAM :o.- KIDNEY, 0E PHILADELPHIA, PENNg SYLVANIA.

To all whom it may concern: 7 Be it known that I, GEORGE BENNETT, Sr, a citizen of the United States, residing at Philadelphia, in the County of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Hemoglobinometers, of which the following is a specification. Q

My invention relates to a new and useful improvement in hem'oglobinometers, for as-- ce'rtaining the amount or Y proportion of hemoglobin in a given sample of blood by comparing'such blood sample with a stand:

ard color by the rays of light from a single source passing through said blood sample and aruby' glass, said rays reaching the eye of the observer througha single eye piece.

The principal objects of my present invention are; first, to so construct aninstrument of this character that it shall be entirely dust proof, all of the parts beinginclosed; second, to provide forthe changing of the observation holes through which the rays of light pass after passing through the sample of blood and the testing glass so as to especially adaptthe instruments for use by various persons having different sight conditions;

third, to provide for the positive rotation of the test glass so'as to avoid the discrepancies in adjustment which have heretofore been attendant upon the adjustment of said disks by frictional contacts; fo'urth,"-to provide a pointer or hand for indicating the graduations at. which the test glass is set and to provide for'the adjustment of said hand independent of the disk so as to calibrate the instrument or adjust'it to the sight of anyparticular individual, said calibration being effected by comparisons with a standard colorfor such'instruinents'; fifth, to provide for sufficient friction upon the test'glass disk to prevent its accidental displacement after being set; sixth, to provide a candle holder which will hold a candle in'proper relative position toitlieobservation openings and permit the ready adjustment ofqsaid candle;

sev nth, to provide a'blood ho'lder for the sample'of blood to be tested thatwill always pass into exact position relative to the test glass and beth'ere held by frictional contact so as to prevent accidental displacement;

eighth, to provide for the reading of the adjustments of the test glass without chang- HEntoeLoBINoMErER.

of such an instrument and render it more" adaptable to the purposes for which 'it is used.

' Specification of Letters Patent. Pztte 'jted S gpt, 13, .1921 j Application filed June 18 1920. Serial No..389,846. i

With these ends in view, this invention consistsin the details' o'f construction and combination of elements hereinafter set" forth and then specifically-designated by the claims. V j

In order that those skilledin the art to which this vinventionappertains, may understand howto make and use the same, I will describe itsconstruction .in details, referring by numerals to the accompanying ."drawings forming a partof this application, in which:. 7

Figure 1, isanedge'view of a nometer made in accordancefwith my improvement. I .j I

Fig.2, 1S aplan view of' Fig. 1, looking.

downward. I

Fig. 3,' is aview similar toFig. 1', the body of the device being in section;

4, is a face viewlof the instrument the face plate being removed to show the interior construction and arrangement of the parts. Fig. 5, is a section at the line 55. of Fig.

3 looking in the direction of the arrow.-

Fig. 6, is a perspective of'the test glass holder or disk showing the test glass thereon. Fig; 7, is a reverse plan viewof Fig. 6

hom -gee.

showin the graduation marks directly upon thetest glass disk.

F ig. 8, is av detail View of the blood holder clamp. J I

Fig. 9, isfan edge view of Fig. 8. Fig. 10, is a spring. r

Fig. 11, an edge .viewfof Fig. 10. y

Fig. 12, 'isa detail perspective ofthe candle holden, 1

Fig'f13, is an enlarged detail of the obsere vation disk.

In carrying out my invention 'ashere em;

I v9O detail view. ofthe'ifrictionf 1 bodied, 1 represents'the casing which is preferably of circular. shape carrying the offset 2,

instrument therein.

screw which passes through the face plate and 4 being a e p es fitted to thecasing so aszto inclose the operatin a -w q and carries a flange S which bears upon one side of the disk while the gear plate 9 is fitted against the opposite side of the disk all being firmly held together by the nut 10 which threads upon said bushing, said bushing being of suflicient length to contact with the faceplate 4 soas to exactly position the disk within thecasing; and in order that said? disk may be held by friction against accidental displacement I provide the spring washer, or friction member 11 which hasa hole-12through the center thereof for fitting over the projecting end of thebush in and this friction member .is also aro vided with the spring prongs or legs 13 which are sobentas to bear upon the under sideof the face plate 4-, whilethe body thereof bears against the outer surface of the nut 10.

1 4: represents a pointer hand having a hub 15' adapted to fit snuglyupon the projecting end of the bushing 7 said hub being split and having the screw 16 run projections therefrom so as to clamp the pointer hand upon the bushing as will be readily, understood, this form of vclamping. the pointer hand upon the bushing will permit of said hanchbeing adjusted relative to the disk to" which the bushing is rigidly secured for V thepurpose hereinafter set forth.

ITrepreSe-nts a dial which is secured stationary within the casing by means of the screws 18 passing through said dial and threaded into the lugs 19, the pointer hand being "adapted to move over the face of said dlal, sald dlal havlng graduations 20 in.- scribed thereon.

In order that the test glass disk may be positively and accurately revolved the gear teeth 21 carried by the gear plate 9 mesh wit-h the pinion 22 carried upon theshaft 23, and this spindle projects through the face plate 3 and has secured thereonthe thumb knob 24tby which arrangement the gear plate and the disk and pointer hand carried thereby will berevolved by the revolving of the thumb knob and as the diameter of the pinion is small relative to the diameter: of

- the gear plate it will require a number of rotations of the pinion to effect a partial revolution of the gear plate, thus tending to increase the accuracyof the adjustment of said gear plate-by the diskcarried thereby, and whenthe proper adjustment has been effected the friction member 11 will hold the P against accidental displacement as before-stated. l .c

The gear plate 9 has an arcuate'slot 25' of light in comparing the color between any given thickness of the test glass and the sample of blood; said test glass being usually cemented to a recessed portion of the disk.

26 represents a telescope or observation tube which is threaded into the boss 27 carried by the face plate t; and the threadedend of this tube is adapted to hold in place a glass disk 28 and an observation disk 29, said observation disk having two holes 30 formed therethrough adjacent each, other for the purpose of permitting the rays of light to pass through the sample of blood'and the test. glass to reach the eye placed at the oppo: site end of the observation tube, the, glass disk 28 being for the purpose of excluding dust at this point and the observation disk being removed for the. purpose of' interchangeability. The object of makingthe observation disk interchangeable as just stated. is to accommodate different persons using the instrument since certain defects in the human eye such as astigmatism require the placing of the holes through these observa tion disks at various distances apart to accommodate the degree of the defect inthe 1 eye of the person using this instrument.

of the blood holding plates 33 and 3e, and,

this clamp has a thumbscrew 35 threaded through the lower portion thereof so that its end will project into said slot; saidend hav 1 ing a non-metallic tip 36 for contact with the blood holder plate 33 so as vto firmly clamp these plates within the slot without atendency to break the same 7 j V The blood holder plate 33 is oftransparent material such as clear glasswhile theplate' 3 1 is of opaque glass, porcelain or the :like and is so reduced in thickness as to reduce the thin slot or space 37 when the two;plates are placed together as shown in Fig. 3 this space being adapted to receive the sample of blood tobe tested. The offset 2 carried by the casing 1 is slotted for the reception of the clamp 31 and one wall of this: slot hasa longitudinal groove 38 formed therein for the reception of the plate spring 39'wl1ichis se cured to one side of the clamp so that When the clamp is passedlinto; the slotted-offset as a key or spline to hold the clamp in proper position and will also force the clamp firmly against the opposite wall of'the slot so as to;

always hold it in exactly the same position when inserted in the offset. A further advantage of this spring is that it creates sulficient' friction to hold the'clamp against accidental displacement after the latter has been inserted in the offset.

40 represents a glass which is set in a'cir cular opening formed in the face plate 4,'said glass being held in place by suitable clips 41 or in any other convenient manner. -This pass to the telescope 26 and this glass may be held in place in any suitable manner for e the purpose of making theins'trument dust proof at this point.

In-order that a candle may be properly held relative to the opening 43 I provide a shank 44 having a' reduced portion 45 for fit ting into the slot 46 carried by the casing 1 and this reduced portion ofthe shank isprovided with a spline 47 which passes into the" slot 48 formed in the socket so as'to bring the shank into fixed relative position to the casing, and inorder that the shank may be removably held within the socket the reduced portion 45 thereof is split as indicated at 48 so as to form a spring pressure upon the side walls of the socket as will be readily understood.

The shank 44 has secured thereto the spring clamp band 49 the outer portion of said band being cut away so that the ends thereof may interlock as clearly shown in Fig. 12, and this clamp is intended to hold the candle and permit the latter to be adjusted up or down as occasion may require so that the flame therefrom may be kept in the proper relative position to the opening 43. The interlocking of the ends of the clamp band provides for the outward springing of this band since the interlocking sections provide an effective stop; and this arrangement also permits the ends of the band to project in opposite directions and in substantially the same plane so that the pressure against these ends will release the grip upon the candle and permit its ready adjustment.

The test glass 26 as here shown is a semicircular wedge shaped prism of ruby glass secured to the portion of the disk 6 which is reduced in thickness by cement or otherwise. As this test glass is turned in front of the observation holes 30 the color of the light passing from the candle through said glass will vary in color as varying thicknesses of this test glass are brought said light, and this variance will be indicated upon the dial by the corresponding graduation registering with the pointer hand as light from the same source passes at the same disk of glass closing the into the path of time through the sample of blood and siinul-- taneously reaches theeye of the observer, an arcuate comparison can bemadebetween the color of the blood and the color of'the light passing through the test glass and when these two colors correspond-the scale will indicate the proportion of hemoglobinin said plate. 7 VVhile' I have'here shown a simple and effective instrument for carrying out-the oii-- jects intended it isobvious that certain modifications might be made'ther'ein, such as 1nscribing-the graduations 20directly on the back of the test glass disk 6 as indicated at,

20 and inFig. 7 locating the pointer hand 14 in a stationary position 'sothat the turningof said disk would carry the graduations'b'eneath'the hand and thereby permit the do termining of the adjustment of said disk. ,I

therefore do not wish to be limited to the exact details of construction asherein shown as these maybe variedwithin the limits of the appended claims without departing from the spirit of my-invention'.' 1 Having thus fully describedmy invention, what I'cl'aim as new and useful is 1. In a hemoglobinometer, ajcas'in-g, 'a

revoluble test glass disk-mounted within said casing, a gear plate securedto' said'disk, said gear plate having an i'arcuate'slot therein forthepassage of lightthroughithe test glass" carried by the disk, a pinion ,Ines'hing' with the teeth of said gear plate, a shaft upon which said pinion is secured,one endof said shaft projecting outside of the casing-"and carrying a thumbknob for revolving said shaft, a dial having graduations marked thereon, said dial being located within the casing, a section of glass set'in one face of the casing so as to bring said graduations into View, a pointer hand so connected with the disk as'torevolve therewith and register with the various graduations upon thedial, a friction member for imparting sufiicient friction to the disk to prevent its accidental displacement when adjusted, and meansfor holding the glass. V v

2. In a hemoglobinometer, a casing, a revoluble test glass disk mounted within said casing, .a gear plate secured to said disk,

said gear plate having an arcuate slot theresampleof blood adjacent the test in the casing, a section of glass set in one face of the caslng so as to bring said graduations into view,ra pointer so connected with the disk as to revolve therewith and register with the various graduations upon the dial,

a friction member for imparting sufiicient friction to the disk to prevent its accidental displacement when ad usted, and means for holding the sample of blood adjacent the test glass, an observation tube and an observa tion-diskremovably located at the base of said tube, said observation disk havingtwo holes therein.

3. In a. hemoglobinometer, a test glass disk, a bushing passing through the center of said disk, a'gear plate secured upon the disk by said bushing, a pointer hand adjustably mounted upon the bushing soas to provide for the calibration of the instrument, a stationary dial over which said hand travels, said dial, carrying predetermined graduations, means for revolving the gear plate and disk secured thereto, and a test member consistingof' aiwedge shaped ruby glass secured to said disk. 1 a

4. In a hemoglobinometer, a test glass disk, a bushing passing through the center of said disk,,a gear plate secured upon the disk by said bushing, a pointer. hand adjustably mounted upon the bushing so as to provide for the calibration of the instrument, a stationary dial over which said hand travels, said dial carrying predetermined graduations, means for revolving the gear plate and disk secured thereto,a test member consisting of awedge shaped ruby glass secured to said disk, a blood holder comprising a transparent section of glass and an opaque section of glass held together by a-clamp screw.

5. In t a hemoglobinometer, a casing, a

non-metallic strip for contact with the glasses inclosing the blood holder. r 6. In a hemoglobinometer of the character described, a dustproof casing,'a-split socket carried by said casing, a shank having-areduced slotted portion adapted to fit within.

said socket, a spline carried bythe reduced portion of the-shank, saidspline adapted to pass between the split ends of the socket and the clamp carried by the shank,.said clamp consisting of a spring band, portions thereof being cut away and interlocking.

' '7. In an instrument of the characterl described, a dust proof casing carrying. two

face plates, glass co'veredopenings formedin. Sitld; face plates,a test glass disk; mountedwithinthe casing'so as to rotate, means for rotating said disk, a test glass-carried by the disk, a bloodholder adapted to slidei n the-casing and. be held inpositionby fric tion, an observation tubecarried by one ofv the face plates of the casing, and an observa tiondisk lOCtttQCllIlYt-hit base of said'tube, said disk having two holes located adjacent each other. w 7 i In testimony whereof Ihave hereunto affiXed my signature.

. GEORGE BENNETT, sir. i 

